#page_bottom  {
	width: 931px;
	margin-right: auto;
	margin-left: auto;
	height: auto;
}
#page_bottom  img  {
	border: 3px solid #666666;
}


#ad1   {
	width: 200px;
	float: left;
}
#ad2 {
	width: 200px;
	float: left;
	margin-left: 36px;
}
#ad3 {
	width: 200px;
	float: left;
	margin-left: 35px;
}
#ad4 {
	width: 200px;
	float: left;
	margin-left: 36px;
}